77 lines
2.4 KiB
C#
77 lines
2.4 KiB
C#
using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Controls.Metadata;
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using Avalonia.Controls.Primitives;
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using Avalonia.Input;
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using Avalonia.Interactivity;
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using Irihi.Avalonia.Shared.Contracts;
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using Irihi.Avalonia.Shared.Helpers;
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namespace Ursa.Controls;
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[TemplatePart(PART_CloseButton, typeof(Button))]
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[TemplatePart(PART_TitleArea, typeof(Panel))]
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public class DialogWindow: Window
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{
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public const string PART_CloseButton = "PART_CloseButton";
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public const string PART_TitleArea = "PART_TitleArea";
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protected override Type StyleKeyOverride { get; } = typeof(DialogWindow);
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protected internal Button? _closeButton;
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private Panel? _titleArea;
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internal bool IsCloseButtonVisible { get; set; }
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static DialogWindow()
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{
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DataContextProperty.Changed.AddClassHandler<DialogWindow, object?>((o, e) => o.OnDataContextChange(e));
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}
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private void OnDataContextChange(AvaloniaPropertyChangedEventArgs<object?> args)
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{
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if (args.OldValue.Value is IDialogContext oldContext)
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{
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oldContext.RequestClose-= OnContextRequestClose;
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}
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if (args.NewValue.Value is IDialogContext newContext)
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{
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newContext.RequestClose += OnContextRequestClose;
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}
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}
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protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
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{
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base.OnApplyTemplate(e);
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Button.ClickEvent.RemoveHandler(OnCloseButtonClicked, _closeButton);
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_titleArea?.RemoveHandler(PointerPressedEvent, OnTitlePointerPressed);
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_closeButton = e.NameScope.Find<Button>(PART_CloseButton);
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Button.IsVisibleProperty.SetValue(IsCloseButtonVisible, _closeButton);
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Button.ClickEvent.AddHandler(OnCloseButtonClicked, _closeButton);
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_titleArea = e.NameScope.Find<Panel>(PART_TitleArea);
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_titleArea?.AddHandler(PointerPressedEvent, OnTitlePointerPressed, RoutingStrategies.Bubble);
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}
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private void OnContextRequestClose(object? sender, object? args)
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{
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Close(args);
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}
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protected virtual void OnCloseButtonClicked(object? sender, RoutedEventArgs args)
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{
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if (DataContext is IDialogContext context)
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{
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context.Close();
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}
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else
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{
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Close(null);
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}
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}
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private void OnTitlePointerPressed(object? sender, PointerPressedEventArgs e)
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{
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this.BeginMoveDrag(e);
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}
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} |